C++ | Leetcode C++题解之第405题数字转换为十六进制数
题目：
题解：
class Solution {
public:
string toHex(int num) {
if (num == 0) {
return "0";
}
string sb;
for (int i = 7; i >= 0; i --) {
int val = (num >> (4 * i)) & 0xf;
if (sb.length() > 0 || val > 0) {
char digit = val < 10 ? (char) ('0' + val) : (char) ('a' + val - 10);
sb.push_back(digit);
}
}
return sb;
}
};